6 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



segment of male abdomen strongly as against slightly concave; (3) 

 first pleopod of male relatively straight and thin as against sinuous 

 and thick, outer side with relatively few subterminal bristles, inner 

 side with large subterminal bristles as against spinules or small 

 bristles. 



Distribution. — Eastern Mediterranean, Red Sea, Ras Abu Somer, 

 Ravayah, Persian Gulf, Gulf of Oman, Malgache [Madagascar], and 

 Seychelles. 



Ckarybdis miles (de Haan) 



Portunus (Charybdis) miles de Haan, 1835, p. 41, pi. 11 (fig. 1). 



Charybdis miles (de Haan). — Stimpson, 1858, p. 39. — Doflein, 1902, p. 659. — 



Rathbun, 1902, p. 27.— Stimpson, 1907, p. 82.— Parisi, 1916, p. 175.— Balss, 



1922, p. 104.— Yokoya, 1933, p. 175.— Sakai, 1939, p. 405, pi. 46 (fig. 2); 



1965, p. 123, pi. 61. 

 Goniosoma miles (de Haan). — A. Milne Edwards, 1861, pp. 378, 385. — Ortmann, 



1893, p. 81. 

 Charybdis {Goniosoma) miles (de Haan). — Alcock, 1899a, pp. 62-3. — Chopra, 



1935, p. 486, fig. 9.— Shen, 1937, p. 123, fig. 13. 

 Charybdis (Charybdis) miles (de Haan). — Leene, 1938, pp. 38-43, figs. 10, 11, 12, 



13.— Stephenson, Hudson, and Campbell, 1957, pp. 500-1, figs. 2H, 31, 



pi. 2 (fig. 3), pi. 4F. — Rees and Stephenson, 1966, p. 37. — Stephenson and 



Rees, 1967, p. 11. 

 Material examined. — 1 male (52.5 mm), 1 ovig. female (47.5 mm), 

 Sta. No. AB-20. 1 male (51.5 mm), Sta. No. AB21-63. 1 male 

 (26.5 mm), 1 female (28 mm), Sta. No. 255A. 4 males (21.5-54 mm), 

 1 ovig. female (47.5 mm), Sta. No. 256A. 1 female (54.5 mm), Sta. 

 No. 261A. 1 male (81.5 mm), 1 female (30.5 mm), Sta. No. 262A. 

 All trawled, depths 55-99 m, muddy bottoms (in cases where 

 records made). 



Remarks. — See C. riversandersoni. 



Distribution. — Previously from Ganjam Coast of India to Hong 

 Kong, Japan, and eastern Australia. Now eastward to GuK of Oman. 



Charybdis natator (Herbst) 



Cancer natator Herbst, 1789, pi. 40 (fig. 1) [fide Leene, 1938]. 



Charybdis (Charybdis) natator (Herbst). — Leene, 1938, pp. 93-7, figs. 50, 51. — 

 Stephenson, Hudson, and Campbell, 1957, pp. 501-2, figs. 2G, 3H, pi. 2 

 (fig. 4), pi. 4J.— Crosnier, 1962, pp. 82-3, figs. 143-4, pi. 13 (fig. 2).— Stephen- 

 son and Rees, 1967, p. 11. 



Charybdis natator (Herbst).— Sakai, 1939, p. 407.— Barnard, 1950, pp. 169-70. 



Material examined. — 1 male (64 mm), Sta. No. AB46-63. 2 fe- 

 males (20-26.5 mm), Sta. No. 201A. 



Both probably trawled, depths 23-55 m, muddy bottom (Sta. 201 A 

 only). 



Remarks.— The small specimens from Station 201A differ from 

 large specimens in having (1) much more conspicuous carapace areas. 



